/*
 * Copyright (c) 2003-2012,2015 KNOPFLERFISH project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials
 *   provided with the distribution.
 *
 * - Neither the name of the KNOPFLERFISH project nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.knopflerfish.bundle.http;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.Hashtable;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;

import org.osgi.service.http.HttpContext;

public class ResourceRegistration
  implements Registration
{

  // private fields

  private final String alias;

  private final HttpContext httpContext;

  private final ServletContextManager contextManager;

  private final ServletContext context;

  private final ServletConfig config;

  // HACK CSM
  private final long lastModificationDate;

  // Bundle that made the registration, quick fix for console
  private Object owner;

  // constructors

  // HACK CSM
  public ResourceRegistration(final String alias, final String realPath,
                              final HttpContext httpContext,
                              final ServletContextManager contextManager,
                              long newDate)
  {
    this.alias = alias;
    this.httpContext = httpContext;
    this.contextManager = contextManager;
    // HACK CSM
    lastModificationDate = newDate;

    context = contextManager.getServletContext(httpContext, realPath);
    config = new ServletConfigImpl(new Hashtable<String, String>(), context);
  }

  // private methods

  private URL getResource(String path)
  {
    if (path.startsWith(alias)) {
      try {
        return context.getResource(HttpUtil.makeTarget(path, alias));
      } catch (final MalformedURLException ignore) {
      }
    }

    return null;
  }

  // implements Registration
  @Override
  public RequestDispatcherImpl getRequestDispatcher(String uri)
  {
    final URL url = getResource(uri);
    
    if (url == null)
      return null;
    
    final RequestDispatcherImpl dispatcher =
      new RequestDispatcherImpl(alias, null, httpContext, config,
                                lastModificationDate, url);
    dispatcher.setURI(uri);
    
    return dispatcher;
  }

  // HACK CSM
  public long getLastModificationDate()
  {
    return lastModificationDate;
  }

  @Override
  public void destroy()
  {
    contextManager.ungetServletContext(context);
  }

  @Override
  public void setOwner(Object o)
  {
    this.owner = o;
  }

  @Override
  public Object getOwner()
  {
    return owner;
  }

} // ResourceRegistration
